989107421 has 8 divisors (see below), whose sum is σ = 1048610304. Its totient is φ = 931329360.

The previous prime is 989107397. The next prime is 989107423. The reversal of 989107421 is 124701989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 989107421 - 2²⁶ = 921998557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989107423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430025 + ... + 432318.

It is an arithmetic number, because the mean of its divisors is an integer number (131076288).

Almost surely, 2^989107421 is an apocalyptic number.

It is an amenable number.

989107421 is a deficient number, since it is larger than the sum of its proper divisors (59502883).

989107421 is a wasteful number, since it uses less digits than its factorization.

989107421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862411.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 989107421 is about 31450.0782351968. The cubic root of 989107421 is about 996.3558768305.

The spelling of 989107421 in words is "nine hundred eighty-nine million, one hundred seven thousand, four hundred twenty-one".